US 12,076,750 B2
Apparatus and method for screening powders
Franciscus Quirinus Fredrik Verouden, Terborg (NL); and Mathijs Cornelis Theodorus Reuling, Terborg (NL)
Assigned to SPACE-XYZ IP B.V., Terborg (NL)
Filed by Space-XYZ IP B.V., Terborg (NL)
Filed on Apr. 28, 2021, as Appl. No. 17/242,699.
Claims priority of application No. 2025437 (NL), filed on Apr. 28, 2020.
Prior Publication US 2021/0331209 A1, Oct. 28, 2021
Int. Cl. B07B 7/06 (2006.01); B07B 1/55 (2006.01); B07B 4/02 (2006.01); B07B 4/08 (2006.01); B07B 9/00 (2006.01); B07B 11/02 (2006.01); B07B 11/06 (2006.01); B08B 5/02 (2006.01)
CPC B07B 7/06 (2013.01) [B07B 11/02 (2013.01); B07B 11/06 (2013.01)] 27 Claims
OG exemplary drawing
 
1. A screening device for screening powders, wherein said device comprises:
a screening space comprising a first chamber and a second chamber, wherein the first chamber and the second chambers are adjacent and have a common partition wall, and
a screen, wherein the screen forms at least a part of the partition wall,
wherein the first chamber comprises a raw material inlet and a residual particle outlet,
wherein the second chamber comprises a product material outlet and a rotatable blade, wherein the rotatable blade comprises one or more nozzles which are configured for blowing gas against the screen,
wherein the screen is placed obliquely or vertically, and in that the first chamber further comprises a float gas unit, wherein the float gas unit is configured for, in use, providing an upwards directed flow of float gas directly into a part of the first chamber, and wherein the screening device is configured for, in use, providing a pressure difference between the first chamber and the second chamber such that the pressure in the second chamber is lower than the pressure in the first chamber, and
wherein the raw material inlet is arranged at a top side of the first chamber, and wherein the float gas unit is arranged at a bottom side of the first chamber and is configured to direct the float gas in the upwards direction such that the float gas provides a counter flow directly against a flow of raw material from the raw material inlet.